I believe there is a $500/month override if your based in Hawaii.
I wouldn't count on the 757 though, they just hired a bunch of new hires into it and staffing on it looks adequate. They are also parking 1 of them later this year and will probably seat lock candidates on it (they will not let them upgrade on anything else since it involves buying you a new type rating). Yes, the seat lock also applies going from FO to CA, as a lot of people are finding out the hard way.
Combine that with a shrinking fleet and a 4-5 year upgrade on the 757 I don't see much more movement on that aircraft. There are also running rumors that the HNL base will be closing next year as well.
Stay flexible!